Internal combustion engine



Sept. 6, 1932. GOOD 1,875,589

INTERNAL COMBUSTION ENGINE Filed Nov. '21, 1924 Ill/I/I/I/l greaterturbulence Patented Sept. 6, 1932 UNITED STATES, PATENT OFFICE JOHNGOOD, GARDEN CITY,

WISCONSIN miwxonx, Assrenon, BY ,MESNE ASSIGNMENTS, 'ro wauxnsna' moronCOIPANZ. or WAUKE8HA,

WISCONSIN, a conronarron or INTERNAL COMBUSTION IEIltIGIIN'IIllApplication filed November 21, 1924. Serial No. 751,214.

The invention relates to internal combust on engines and moreparticularly to the design of the valve porting and combustion spacetherein and its ob ect is to provide in the compression space and tokeep the exhaust valve cooler, thereby improving the efliciency anddurability of the engine, and to accomplish these results in design..

In the accompanying drawing, Fig. 1 represents a top plan of afour-cylinder engine embodying the invention, the arrangement of thecylinders and their valves being indicated by dotted lines.

Fig. 2' is a horizontal section of a portion of the cylinder head online IIII of Fig. 3.

Fig. 3 is III-III and Fig. 4 is a section of Fig. 2 on line IV-IV.

The cylinders of the engine are marked 1, belng water jacketed, asusual, and they are arranged as usual in the plane of their common crankshaft 2. The cam shaft is marked 3. Each cylinder is provided with anintake .valve 4 and an exhaust valve 5 and the row of valves is parallelwith the longitudinalaxis of the engine, and, in the present case, theyare situated directly above the cam shaft 3 so as to be operated by thelatter. The cylinder head 6 1s common to all of the cylinders in thepresent case and removable, although this is not necessary. For eachcylinder, the head is formed with an interior deflecting wall 7 situatedbetween the intake valve 4 and the piston space and this wall has theefi'ect of deflecting or directing the incom ing medium or 'carburetedmixture longitudinally of the engine and over or adjacent to the exhaustvalve 5, whence it passes laterally and downwardly to the piston space.

The part of the cylinder head wall, on the piston side of the deflectingwall 7 and which is marked 8 in the drawing, may be di osed as close asdesired to the limit of the u ward movement of the piston 9, dependingupon the compress on ratio desired for the engine.

' Preferably it is located at the minimum prac tical clearance distancefrom the piston asindicated in Fig. 3, so that on compression an engineotherwise of standard structural:

a section of Fig. 2 on linedead center the body or mass of thecompressed mixture will occupy the L-shaped space over one side of thepiston and over the two valves. By this arrangement the defleeting wall7 I on the head structure and is efiiciently cooled by the jacket andadvantages of combustion accrue from the compact disposition of thecharge. In any event the deflecting wall 7 is so related to the rest ofthe cylinderhead as to avoid excessive temperatures occurring in it.This may be, done in any .way which rovides an adequate heat-conductingpath rom the wall to the surrounding water or other heat-abstractingmedium.

The spark plug may be located at any suitable point where it will reachthe compressed mixture, but it has been ,found that the most eflicientoperation of the engine the plu is situated directly over the exhaustvalve, 513.12 is to say, at the angle or corner of the L-shaped spaceabove referred to.

is constituted by a shoulder occurs when -water in the cylinder headincorporated in a water-cooled engine, but it will now be apparent thatthe same arrangement of the deflecting wall 7 can be incorporated in anair-cooled engine, if preferred, and it will be further understood thatthe structural design of the invention is subject to variation inaccordance with the preference of the engine builder, and that the ad- Ivantages of the deflecting wall will be present, whether the same isvformed as a part of a removable cylinder head or as a part of thecylinder body so long as it is-sufiiciently cooled by the water jacketor the external air current.

I claim:

1. In an engine of the character described, a cylinder, a piston, acylinder head provided with a primaryvalve controlled combustion chamberto one side of the cylinder and also p-ovided with a secondarycombustion chamr communicating with the primary chamber and slopingdownwardly therefrom and extending above the piston face at least to theplane extending through the adjacent piston axes and remote from thepiston face center, said cylinder head having a wall providing aclearance above the remainder of the piston face when the iston is atthe upper limit ofits stroke, in e and exhaust valves for said primarychamber arranged to provide of the exhaud; valve b the intake gasespassing from the primary amber to the cylinder. v

2. In an engine of the character described, a cylinder, a piston acylinder head provided m with a primary valve controlled combustionchamber to one side of the cylinder and also provided with a straightsecon' combustron cnamber communicating wi the pri- -mary chamber andsloping downwardly i5 therefrom and extending'above the piston face atleast to the plane extending throu the adjacent piston axes and remotefrom t e iston face center, saidcylinder head havmg a wall providingminimum clearance above the remainder oi'the piston face when I thepiston is at the upper limit of its stroke, and intake and exhaustvalves for said primary chamber arranged to provide coolmg of theexltlaust valve by the intake gases passing from the primary chamber tothe cylinder.

3. In an engine of the character described a cylinder, 9. piston, acylinder head provided with a primary valve eon lled combustion mchamber to one side of the cylinder and also provided with asecondarycombustion chamber communicating with the primary chamber and slopingdownwardly therefrom, said secondary chamber overlying approximately aquadrant of the piston face the sides of which uadrant are defined bythe transverse axial p ane of the piston and the plane of adj acentpiston axes, said cylinder head having a wall provi minimum clearance 40above the remainder o the piston face when the piston is at the upperlimit of-its stroke, and intake and exhaust valves for said pri-' marychamber arranged to provide'coohng of the exhaust valve by the intakegases pass- Eng from the primary chamber to the cylin- In testimonywhereof, I have signed this specification. J om: GOOD.

